Calpeptin Reduces Neurobehavioral Deficits and Neuronal Apoptosis Following Subarachnoid Hemorrhage in Rats

This study was undertaken to determine the effects of inhibition of calpain on neurological deficit and neuronal apoptosis following experimental SAH.
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Source Type: research

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AbstractSpreading depolarization is observed as a large negative shift of the direct current potential, swelling of neuronal somas, and dendritic beading in the brain ’s gray matter and represents a state of a potentially reversible mass injury. Its hallmark is the abrupt, massive ion translocation between intraneuronal and extracellular compartment that causes water uptake (= cytotoxic edema) and massive glutamate release. Dependent on the tissue’s energy st atus, spreading depolarization can co-occur with different depression or silencing patterns of spontaneous activity. In adequately supplied tissue, spread...
Source: AGE - Category: Geriatrics Source Type: research
Conclusions: Stroke is uncommon in cirrhotic patients. However, considering a positive relationship of liver cirrhosis with subarachnoid and intracranial hemorrhage, the prophylactic strategy may be selectively adopted in cirrhotic patients.
Source: Journal of Clinical Gastroenterology - Category: Gastroenterology Tags: LIVER, PANCREAS & BILIARY TRACT: Original Articles Source Type: research
AbstractPrevious studies showed that complement activation is associated with poor functional outcome after aneurysmal subarachnoid hemorrhage (SAH). We investigated whether complement activation is underlying brain injury after aneurysmal SAH (n = 7) and if it is an appropriate treatment target. We investigated complement expression in brain tissue of aneurysmal SAH patients (n = 930) and studied the role of common genetic variants in C3 and C5 genes in outcome. We analyzed plasma levels (n = 229) to identify the functionality of a single nucleotide polymorphism (SNP) associated with ...
Source: Translational Stroke Research - Category: Neurology Source Type: research
AbstractThe initial clinical status after subarachnoid hemorrhage (SAH) is an important outcome predictor, but the mechanisms behind the early brain injury (EBI) remains incompletely understood. Elevated neurofilament levels in the cerebrospinal fluid at protracted stages after SAH are associated with poor outcome, but the potential association between plasma neurofilament (pNfL) levels during EBI, disease severity on admission, and poor outcome remains unaddressed. Plasma NfL (pNfL) was measured by single molecule array in 44 SAH patients on admission and 24  h after ictus, as well as in 44 controls. Disease severity...
Source: Translational Stroke Research - Category: Neurology Source Type: research
Abstract Aneurysmal subarachnoid hemorrhage (SAH) is an acute cerebrovascular emergency resulting from the rupture of a brain aneurysm. Despite only accounting for 5% of all strokes, SAH imposes a significant health burden on society due to its relatively young age at onset. Those who survive the initial bleed are often afflicted with severe disabilities thought to result from delayed cerebral ischemia (DCI). Consequently, elucidating the underlying mechanistic pathways implicated in DCI development following SAH remains a priority. Neuroinflammation has recently been implicated as a promising new theory for the d...
Source: Cellular and Molecular Neurobiology - Category: Cytology Authors: Tags: Cell Mol Neurobiol Source Type: research
Abstract Transcranial Doppler (TCD) ultrasonography is an inexpensive, noninvasive means of measuring blood flow within the arteries of the brain. In this review, the authors outline the technology underlying TCD ultrasonography and describe its uses in patients with neurosurgical diseases. One of the most common uses of TCD ultrasonography is monitoring for vasospasm following subarachnoid hemorrhage. In this setting, elevated blood flow velocities serve as a proxy for vasospasm and can herald the onset of ischemia. TCD ultrasonography is also useful in the evaluation and management of occlusive cerebrovascular d...
Source: Neurosurgical Focus - Category: Neurosurgery Authors: Tags: Neurosurg Focus Source Type: research
AbstractNeuroinflammation can be caused by various factors in early brain injury (EBI) after subarachnoid hemorrhage (SAH) One of the most important features of this process is M1 microglial activation. In turn, the TLR4/NF ‐κB pathway plays an essential role in activating M1 phenotypic microglia. Biglycan (BGN), a small leucine‐rich proteoglycan, functions as an endogenous ligand of TLR4 and TLR2 in macrophages. However, the underlying mechanisms associated with microglial activation in stroke pathogenesis are po orly understood. Here, we aimed to identify the role of biglycan in neuroinflammation following SAH....
Source: Journal of Neurochemistry - Category: Neuroscience Authors: Tags: ORIGINAL ARTICLE Source Type: research
Conclusions: Baseline RDW should be integrated into clinical practice as a predictor of ischemic stroke occurrence and outcome. Future studies should also explore the dynamic change of RDW in post-stroke patients to evaluate the clinical significance of RDW and its impact on the inflammatory state of ischemic stroke.
Source: Frontiers in Neurology - Category: Neurology Source Type: research
ConclusionsPatients with hemorrhagic stroke and enhanced renal clearance displayed PK alterations favoring an increased elimination of vancomycin than expected. This may result in underexposure to vancomycin, leading to treatment failure.
Source: Journal of Intensive Care - Category: Intensive Care Source Type: research
We examined the effect of RD on early brain injury (EBI) and delayed cerebral ischemia (DCI) as a primary endpoint, and also explored the effect on cerebral vasospasm (CVS) as a secondary endpoint. Although RD did not exert significant effects on primary endpoint, RD signi ficantly prevented CVS and reduced SAH-induced increases in the number of phosphorylated extracellular signal-regulated kinase (ERK)-positive endothelial cells, cyclooxygenase-2 expression, and macrophage infiltration in major cerebral arteries. Moreover, RD significantly decreased the areas display ing dopamine β-hydroxylase and glial fibrillary ac...
Source: Translational Stroke Research - Category: Neurology Source Type: research
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